package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;

/**
 * @Author: WangHongKun
 * @Date: 2022/9/22 16:58
 * @Email: 2028911483@qq.com
 * @Phone: 18683977706
 */

@Service
public class UserServiceImpl implements UserService {
    public static final String WX_LOGIN ="https://api.weixin.qq.com/sns/jscode2session";
    public static final String GRANT_TYPE ="authorization_code";


    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatProperties weChatProperties;

    @Override
    @Transactional
    public User login(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());
        if(openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        User user = userMapper.getByOpenId(openid);
        //表示该用户暂未被注册过则，先注册用户
        if(user == null){
            user =User.builder()
                     .createTime(LocalDateTime.now())
                     .openid(userLoginDTO.getCode())
                     .build();
            //自增 id  会保存到user中
            userMapper.Insert(user);
        }
        //如果能查询到该用户
        return user;

    }



    public String  getOpenid(String code){
        HashMap<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type",GRANT_TYPE);
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        JSONObject jsonObject = JSON.parseObject(json);
        String  openid = (String) jsonObject.get("openid");
        return openid;
    }
}
